Device for lifting heavy metallic plates.



PATENTED MAR. 20, 19,06.

r M. MAYNARD.

DEVICE FOR LIFTING HEAVY METALLIC PLATES.

APPLIUATIOH FILED SEPT; 21, 1905.

moses \ngxwrk,

oivirn n STATES PATENT OFFICE.

finesse-MA NA D; oFn'ANcocL IcHieAN.j

' DE VlCE F OR IFTIN HEAVY METALLIC Pl-ATES.

I Application filed September 21, 1905. Serial No. 279,529- I useful Improvements in Devices for Lifting.

Heavy Metallic Plates; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being and to the letters of reference marked thereon, which form a part of this specification.

This invention relates'to certain new and useful improvements in apparatus for lifting heavy metallic plates found in ship-yards, &c.; and the object of 'the invention is to provide a simple and efficient device whereby a plate may be securely gripped and held while being raised and conveyed from one lo? cation to another.

My invention consists in various details of construction and in combinations and arrangements of parts which will be hereinafter fully described and then specifically 'de-' fined in the appended claims.

Iillustrate my invention in the accompanying drawings, in which Figure 1 shows the application of my invention as gripping and holding a plate, and

Fig. 2 is an enlarged detail view showing the jaws held from gripping contact with the ate. 4

p Reference now being had'to the details of the drawings by letter, A designates two hooks, each of which hasaflat portion upon which the opposite marginal edges of the 1 plate are adapted to rest, as shown in the I said points D, and F F designate chains secured at their corresponding1 ends to the ledrawings. B B designate set-screws, each passing through said hook and against the inner ends of which plates are adapted to be held in the manner about to .be described. Each of said hooks carries a pivotal point D, andE E designate levers pivoted each upon one of vers E and connected toget er to an eyeH, to which a chain or hoisting-cable-K is con- Specification of Letters Patent.

had to the accompanying drawings,

Patented Mach 20, 1906.

nected. The inner end of eachof said levers E upon its under ed e is conveXed and provided with a series 0 spurs or teeth 11, which are designed as the outer ends of the levers are raised to bite or grip the upper surface of the plate and cause the opposite edges of the plate to bind frictionally against the inner ends of said set-screws, thereby se-. curely holding the plate while it is engaged by the hooks. The greater the tension upon the spur ends of the hooks the more securely will the plate be held by thelatter, thus effectually preventing the hooks from becoming accidentally detached from the plate and allowing the same to be transported from place to place.

By the provision of the set-screws mounted in the manner shown and which vcornprises the essential feature of my invention, I afford means for securely holding the plate and preventing any possible slipping of the plate upon the jaws in the event of the opposite edges of the plate not coming in contact with the edges of the hook';-but the set-screws will serve to give a lateral adjustmentto the plate which might prevent injuring of its surface at, various locations through contact with the indented jaws.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is'

I 1. An apparatus for holding plates, comprising hooks adapted to engage the opposite edges of a plate, a set-screw carried by each hook, levers pivoted to said hooks and adapted to hold said screws against the edges of the plate, as set forth.

2. An apparatus for holding heavy metallic plates, comprising hooks having flattened portions adapted to receive the opposite I edges of a plate, set-screws passing through said hooks and adapted to engage the edges of the plate, and levers pivoted one to each of said hooks, and having teeth upon their plateengagingportions designed to hold the setscrews against the edges of the plate, as set forth.-' 3. An apparatus for holding heavy metal- .lic plates, comprising hooks having flattened portions adapted to receive the opposite the edge thereof, and cables connecting the edges of a plate, set-screws passing through said hooks and adapted to engage the edges of the plate, a lever pivotally connected to each of said hooks, the under edge of each lever near one end being convexed and provided with Spurs designed to ngage a plate and hold the inner end of the set-screw against outer ends of said levers, as set fortl 10 In testimony whereof I hereunto aflix my signature in the presence of two W1 tnesses.

MOSES MAYNARD.

Witnesses: W. FRANK JAMES,

KATE A. BIRK. 

